Hush tube



- UNITED-'STATES ATENr oFFi-cs f- Patented Mar. 5, 1940 animes HUsH TUBEf Morris J Hyman, Philadelphia, Pa.l Application september 9,1938,seri-a1 No. 229,04*:A

1 Claim.

My invention relates to hush pipes as used in water closets and relatesparticularly to replacing broken-off hush pipes.

Water closets have a stream of water enter into a chamber, and therelease of a control wall Valve permits the water to be discharged intothe waste bowl. The water entering into the chamber passes through acontrol valve which is usually at the upper part of the chamber, and theopening or closing of the valve is controlled by a oat whereby the valveis closed when the float reaches the upper predetermined level. Theincoming water passes through the valve and exhausts through anelongated hush tube which extends from the valve at the upper part ofthe chamber to the lower part of the chamber. The purpose of having theelongated pipe is to enable the water to descend from the upper part ofthe chamber to the lower part of the chamber with a silencing action.

The hush tube is generally composed of copper and is screw-threaded intoa complementary opening in the valve. In the course of time, corrosionoccurs at the junction of the valve and the hush tube, and the.corrosion causes thehush pipe to break from the valve. If the hush pipeis not replaced, the water will descend from the top of the chamberthrough the valve and drop noisily upon the bottom of the chamber.

To remove the valve and rethread the valve to receive a new hush tube isnot only a laborious ytask but is diflicult: because if the hush tubehas broken, there is also a` likelihood that the other parts of thevalve are corroded. i

Heretofore, no devices have been constructed to replace the hush tubewithout removing the valve. v

It is, therefore, an object of my invention to provide a replacement fora corroded broken-oli:` hush tube.

A further object of my invention is to providey Fig. 1 is alfragmentaryview of a Water-closet discharge tube I4 of the control valve B (Fig.2)`

usually has a screw thread i6 therein to receive an end of ascrew-threaded hollow pipe, and when the pipe corrodes and is brokenoff, a small section I8 of pipe remains in the valve discharge outleti4. Since the water closet chamber I is' relatively narrow and thedefining wall is high, it is almost impossible to remove the remainingbroken piece of pipein order to insert av newly threaded hush tube.

I, therefore, case harden a tapered threaded bushing C havingfacets 2lithereon and `force a piece of metal tubing D into the bore of thebushing. The facets serve as surfaces whereby a wrench may be used toltighten the bushing. I then turn the self-threading bushing C into thebroken-off piece of tube I8 so that the end 22 of the hush tube isadjacent the 'bottom' of the chamber.

To provide an additional silencing action to the hush tube D, I may adda plurality of grooves to the lower end of the tube whereby the whirlingwater will trickle softly from the tube.

In Fig. 3 I show a second modication of my invention wherein a hush tubeDI has vone end expanded to provide a flange 30', and the tubes diameternear the flange is reduced, as at 32, to receive the bore of the casehardened self-threading bushing CI. The bushing Cl is held tightlybetween the flange 30 and an inturned portion 34 of tube DI, and thebushings bore tightly receives the outer diameter of the reduced portion32 of the tube. The major portion of the tube is of a diameter equal `tothat of the replaced tube in order to permit water to properly passtherethrough. l

In Fig. 4 I show a third modification of my invention wherein a hushtube D2, preferably composed of copper, has an out-turned endlange 4H.Spaced from the anged end of the tube is a .threaded portion 42 uponwhich a threading courpling 44 interts.

' the Water closet.

Although my invention has been described in considerable detail, suchdescription is intended as illustrative rather than limiting, since theinvention may be variously embodied, and the scope of the invention isto be determined as claimed.

I claim as my invention:

A hush tube adapted to be joined to a broken piece of pipe in avdischarge outlet comprising a tube, a portion of said tube adjacent oneend having an inturned flange, the outer end of the tube outwardlyturned to form a second ange, a selfthreading bushing positioned betweenthe inturned and out-turned anges, and said thread being Vadapted to beconnected into a broken-off piece of metallic pipe.

MORRIS J. HYMAN.

